<template>
  <div>
    <!--  面包屑导航区域  -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!--  添加角色按钮区域    -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!--角色列表区域 -->
      <el-table :data="rolesList" border >
        <el-table-column type="expand">         <!--展开列 -->
          <template slot-scope="scope">
            <el-row v-for="(item1,i1) in scope.row.children" :key="item1.id" :class="['bdbottom',i1==0?'bdtop':'','vcenter']">
              <!--渲染一级权限 -->
              <el-col :span="5" >
                <el-tag  closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag><i class="el-icon-caret-right"></i>
              </el-col>
              <!--渲染二级三级权限 -->
              <el-col :span="19">
                <!--通过for循环嵌套渲染二级权限 -->
                <el-row v-for="(item2,i2) in item1.children" :key="item2.id" :class="[i2 == 0?'':'bdtop','vcenter']" >
                  <el-col :span="6" >
                    <el-tag type="success">{{item2.authName}}</el-tag><i class="el-icon-caret-right" closable @close="removeRightById(scope.row,item2.id)"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag v-for="item3 in item2.children" :key="item3.id" type="warning" closable
                      @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!--            <pre>
              {{scope.row}}
            </pre>-->
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" class="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" class="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" class="el-icon-setting" @click="showShowRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!--  分配权限对话框  -->
    <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="30%" @close="setRightDialogClose">
      <!--   树形控件   -->
      <el-tree :data="rightsList" :props="propsTree" 
        default-expand-all show-checkbox node-key="id"
         :default-checked-keys="defKeys"
         ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRigts">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    name: "Roles",
    data(){
      return {
        //所有角色列表数据
        rolesList:'',
        //控制分配权限对话框的显示与隐藏
        setRightDialogVisible : false,
        //所有用户的权限
        rightsList:[],
        //树形控件的属性绑定对象
        propsTree:{
          label:'authName',
          chilldren:'chilldren'
        },
        //默认选中的节点的id值
        defKeys:[],
        //当前即将分配权限的id
        roleId:'',
      }
    },
    created(){
      this.getRolesList()
    },
    methods:{
      async getRolesList(){
        const {data:res} = await this.$http.get('roles')
        if(res.meta.status !== 200){
          return this.$message.error("查询错误")
        }else{
          this.rolesList = res.data
        }
        console.log(this.rolesList)
      },
      //根据id删除对应的权限
      async removeRightById(role,rightId){
        const confirmResult =await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        if(confirmResult !== 'confirm'){
          return this.$message.info("你取消了删除")
        }else{
          const {data:res} = await this.$http.delete('roles/'+role.id+'/rights/'+rightId)
          if(res.meta.status !== 200){
            return this.$message.error("删除失败")
          }
          role.children = res.data
        }
      },
      //展示分配权限对话框
      async showShowRightDialog(role){
          this.roleId = role.id
        //获取所有权限的数据
        const {data:res} = await this.$http.get('rights/tree')
        if(res.meta.status != 200){
          return this.$message.error("查询错误")
        }else{
          //把获取到的数据保存到data中
          this.rightsList = res.data
          console.log(this.rightsList)
        }
        this.getLeafKeys(role,this.defKeys)
        this.setRightDialogVisible=true
      },
      //通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys中
      getLeafKeys(node,arr){
        //如果当前节点不包含child属性就是三级节点
        if(!node.children){
          return arr.push(node.id)
        }
        node.children.forEach(item => this.getLeafKeys(item,arr))
      },
      //监听分配权限对话框的关闭
      setRightDialogClose(){
        this.defKeys=[]
      },
      //点击为角色分配权限
      async allotRigts(){
          const keys = [
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
          const idStr = keys.join(',')
          const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
          
          if(res.meta.status !== 200){
              return this.$message.error("分配权限角色失败")
          }
         this.getRolesList();
         this.setRightDialogVisible= false
      }
    }
  }
</script>

<style scoped>
  .el-tag{
    margin: 7px;
  }
  .bdtop{
    border-top:1px solid #eeeeee;
  }
  .bdbottom{
    border-bottom:1px solid #eeeeee;
  }
  .vcenter{
    display: flex;
    align-items: center;
  }
</style>